Short Strangle
Selling an OTM call and an OTM put: less credit than the straddle in exchange for a much wider profit zone and more manageable gamma.
Profit / Loss Diagram
Short Strangle at expiration
What is this strategy?
The Short Strangle sells an out-of-the-money call and an out-of-the-money put with the same expiration, leaving a band between the two strikes inside which the position reaches its maximum gain. It is the premium-selling structure of choice among traders who run volatility portfolios, and its advantage over the straddle is margin for error: the profit zone is considerably wider, gamma is less aggressive, and the position forgives moderate moves without needing intervention.
The credit collected is smaller than a straddle’s because out-of-the-money options are worth less, but in exchange the probability that both expire worthless is substantially higher. Standard selection places each leg at a delta between 0.16 and 0.30, corresponding to roughly a 70-84% probability that the leg expires worthless. Combining both, the probability that the whole structure ends at maximum gain usually sits between 55% and 70%, with the probability of ending with <em>some</em> profit considerably higher.
Risk remains undefined: unlimited to the upside and very large to the downside. The difference from the straddle is one of degree, not of nature, and it demands the same discipline: liquid underlyings, an elevated IV Rank that justifies the sale, small size, no catalysts before expiration and written exit rules. The defined-risk version of this same idea is the Iron Condor, which buys protective wings in exchange for part of the credit and is the right choice for most accounts.
Construction
| Action | Instrument | Strike | Expiration | Example |
|---|---|---|---|---|
| SELL | 1 Put (OTM) | Delta 0.16-0.30 | 30-45 DTE | -1 XYZ 90 Put |
| SELL | 1 Call (OTM) | Delta 0.16-0.30 | Same expiry | -1 XYZ 110 Call |
Example
Scenario: XYZ at $100 with IV Rank 62, no events until after expiration. You sell the 90/110 strangle 40 days out with both legs at delta 0.20.
- Put Sold (OTM) -1 XYZ 90 Put @ $1.55
- Call Sold (OTM) -1 XYZ 110 Call @ $1.45
- Total Credit $300 (1.55 + 1.45 × 100)
- Maximum Gain $300 (if XYZ closes between 90 and 110)
- Maximum Loss Unlimited to the upside; $8,700 if XYZ falls to zero
- Lower Breakeven $87.00 (90 − 3.00)
- Upper Breakeven $113.00 (110 + 3.00)
- Profit zone From $87 to $113 — a 26% range tolerated
- Management target Buy it back at $150 (50% of the credit) and close
- Loss limit Close if the buy-back costs $600 (twice the credit)
The Greeks
With both legs at similar delta, the position starts neutral. With the strikes further out, gamma is lower and neutrality survives moderate moves — unlike the straddle.
The extrinsic value of both legs erodes in your favour every day. It is smaller in absolute terms than a straddle’s, but so is the risk taken per unit of credit.
A compression of implied volatility makes the buy-back cheaper and generates profit without price moving. It is the main engine of the structure when opened at high IV Rank.
Lower than a straddle’s while price stays inside the band. It spikes if the underlying approaches either strike, and that is the moment to manage.
Position Management
- 01 Close at 50% of the Credit Buying the structure back when it is worth half of what you collected usually happens in considerably less than half the time. That multiplies return per day of capital employed and avoids the final stretch of maximum gamma risk.
- 02 Manage at 21 Days With less than three weeks to expiration, gamma makes the position move too fast. Closing or rolling to a later expiration at that point is the rule that prevents the most large losses.
- 03 Roll the Unthreatened Leg If price approaches a strike, moving the opposite leg towards the money collects extra credit and improves the threatened breakeven. It recentres the position, but it increases risk on the side that was working: use it with judgement, not automatically.
- 04 Roll Out in Time for a Net Credit If the thesis is still alive and only the calendar failed, rolling both legs to a later expiration while collecting additional credit buys time and improves the breakevens. Rolling for a debit is adding to a losing bet.
- 05 Size by the Worst Case Work out what you lose on a 20% adverse move, not a 5% one. If that figure is not acceptable, cut contracts before opening, not after.